The 1918 California gubernatorial election was held on November 5, 1918. William Stephens had defeated James Rolph for the Republican nomination.

William Dennison Stephens was an American federal and state politician. A three-term member of the U.S. House of Representatives from 1911 to 1916, Stephens was the 24th governor of California from 1917 to 1923. Prior to becoming Governor, Stephens served as the 27th Lieutenant Governor of California from 1916 to 1917, due to the death of John Morton Eshleman, and served a brief time as Mayor of Los Angeles in 1909 due to the resignation of Arthur C. Harper.